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krok68 [10]
3 years ago
15

Which of the following is a chemical change?

Chemistry
1 answer:
monitta3 years ago
5 0

Answer: C: A burning candle

Explanation:

C is a Combustion reaction and this is a chemical change.

The rest are physical changed because they are only changing state.

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Which of these properties would be possessed by both acids and bases? note: we do not mean mixing both in the same solution. we
Firdavs [7]
Answer is: <span>3. they conduct electricity.
1) acids taste sour, bases taste bitter.
2) acid </span><span>would react with metals and produce hydrogen gas:
Ca(s) + 2HCl(aq) </span>→ CaCl₂(aq) + H₂(g).
3) Acids and bases give ions in water solutions, so <span>they conduct electricity.
</span>

An Arrhenius base is a substance that dissociates in water to form hydroxide ions (OH⁻<span>). 
In this example lithium hydroxide is an Arrhenius base:</span>

LiOH(aq) → Li⁺(aq) + OH⁻(aq).

An Arrhenius acid is a substance that dissociates in water to form hydrogen ions or protons (H⁺<span>). 
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4) red litmus turn blue whe base is drop on it and blue litmus turn red when acid is drop on it.

5) bases have pH greater than 7, acids have pH less than 7.

5 0
3 years ago
When water is electrolyzed, it splits into hydrogen and oxygen.
Westkost [7]

The mass of water is equal to the combined mass of hydrogen and oxygen.

<h3>What is Mass?</h3>

This is defined as the quantity of matter in a physical body. The electrolysis reaction of water can be seen below:

2 H₂O ---> 2 H₂ + O₂

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Read more about Mass here brainly.com/question/25121535

4 0
2 years ago
Give me a statement regarding the process of science discovery and development of atomic theory
matrenka [14]
Can you say please? Just kidding!
The process of science discovery depends upon changing your theories based upons new evidence from new experiments.  New technology allows for new experiments, leading to new theories.  
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3 years ago
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Evgen [1.6K]

Answer: B) It presents the correct sequence of events in Earth’s history.

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CAM plants function using crassulacean acid metabolism. Like C4 plants, CAM plants provide preparatory step for the Calvin cycle
poizon [28]

Answer: ORGANIC ACIDS  

Explanation:

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CO2 + PEP  ⇒ C4H4O5 (oxaloacetate)

Oxaloacetate is then converted to a similar molecule, Malate (C4H6O5,  another form of organic compound) that can be transported in to the bundle-sheath cells. Malate enters the plasmodesmata and releases the CO2. The CO2 then fixed by rubisco and made into sugars via the Calvin cycle.

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3 years ago
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